目录
前言................................................II
1 范围...............................................1
2记发器信号.............................................1
2.1信号编码..........................................1
2.2信号单元..........................................2
2.3记发器信号发送顺序............................. 2
2.4强插、强拆操作 ......................................4
3线路信号..............………4
3.1E/M线路信号......................................4
3.2数字线路信号........................................7
参考文献............................................  10